On the advanced lapping process in the precision finishing of thin-film magnetic recording heads for rigid disc drives

Jiang, Ming; Hao, S.; Komanduri, R.

doi:10.1007/s00339-002-2021-4

Cited by 27 publications

(21 citation statements)

References 5 publications

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“…As shown in Table 2, the smaller diamond size achieved lower ABS roughness for both Al 2 O 3 and AlTiC which agreed with the results by Jiang et al (2003). In principle, the embedded diamond abrasives lapped the ABS by scratching the ABS.…”

Section: Roughness Versus Diamond Sizesupporting

confidence: 93%

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Slider surface control for ultra-high density recording

et al. 2009

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Ultra-high density magnetic recording requires very low head-media physical spacing of less than 5 nm. The surface morphologies of the slider's air-bearing surface (ABS) and the magnetic media surface are key limiting parameters to achieve this spacing requirement and therefore need to be further improved. For slider's ABS, further reduction in surface roughness means further optimization of the nanogrinding process. This paper presents an experimental study to reduce ABS roughness in the nanogrinding process with fine diamond abrasives that are 50 nm in size. Average roughness (R a ) of approximately 0.2 and 0.3 nm was achieved for Al 2 O 3 and AlTiC portions of the ABS, respectively. Nanogrinding process parameters, such as load and speed did not affect the minimum ABS roughness significantly. However, the load applied affected the time required to attain the minimum roughness value.

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Section: Roughness Versus Diamond Sizesupporting

confidence: 93%

“…Fixed-abrasive lapping is a two-body abrasion process, which uses fixed abrasives embedded or charged in a soft lapping plate (Jiang et al 2003). Herein lays the key challenge in using very fine diamond abrasivesembedding the diamond abrasives onto the lapping plate.…”

Section: Fine Diamond Abrasives Challengesmentioning

confidence: 99%

Slider surface control for ultra-high density recording

et al. 2009

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“…2). This result is expected since surface energy generally increases in the following order: Al 2 O 3 -TiC ceramics \ metal oxides \ metals [4]. Among the metal alloys, the sample made of 83:17 Ni-Fe has the highest surface energy.…”

Section: Surface Energy Measurementsmentioning

confidence: 60%

“…The slider, however, is made of different types of material: metal alloy (Ni x Fe y ), metal oxide (Al 2 O 3 ), and ceramic (Al 2 O 3 -TiC); and consistency of material removal between these different materials during the lapping process remains a challenge [4]. Thus, the parameters in lapping are still being optimized, one of which is the choice of lubricant.…”

Section: Introductionmentioning

confidence: 98%

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Surface Energies of Magnetic Recording Head Components

Abenojar

Herber²,

Enriquez

2010

Tribol Lett

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The rate of material removal during fixed abrasive lapping is a function of friction coefficient, the surface tension of the lubricant and of the substrate, and the contact angles between the interfaces. In this study, the authors measured the surface energies of materials typically found in thin film magnetic recording heads using contact angle measurements and the Lifshitz-van der Waals acid/base approach. The different materials tested were Ni x Fe y , Al 2 O 3 , and Al 2 O 3 -TiC. Sample preparation procedures were also considered. The chemical used to wash the surface was observed to affect the measured substrate surface energies. Surface energy values for samples washed with either acetone or hexane showed comparable results. The Ni x Fe y gave the highest measured surface energy (46.3-48.8 mJ m -2 ) followed by Al 2 O 3 (44.1-45.3 mJ m -2 ) and Al 2 O 3 -TiC (43.3-45.3 mJ m -2 ). In contrast, the oil-washed samples measured generally lower surface energy values. The study characterized the interaction of two lubricant types against the three materials. The oil-based lubricant spreads completely on oilwashed samples mainly because of the low surface tension of the oil (22.0 mJ m -2 ) and did not show measurable contact angles. In comparison, the water-soluble lubricant ethylene glycol, due to its higher surface tension (48.0 mJ m -2 ), formed higher contact angles ranging from 47.2 to 59.6°on the different substrates.

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Nonlinear Filtering Method for Corrosion Detection on Pole Tips

Muneesawang¹,

Yammen²

2015

Visual Inspection Technology in the Hard Disk Drive Industry

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On the advanced lapping process in the precision finishing of thin-film magnetic recording heads for rigid disc drives

Cited by 27 publications

References 5 publications

Slider surface control for ultra-high density recording

Slider surface control for ultra-high density recording

Surface Energies of Magnetic Recording Head Components

Nonlinear Filtering Method for Corrosion Detection on Pole Tips

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